Double Containment Tubing

Zeus provides high-quality Double Containment tubing, a material of choice in semiconductor, critical fluid, and other industries that require low levels of chemical extractables and high continuous service temperature.

In addition to our high performing conventional tubing, Zeus offers Industry Standard Double Containment tubing (also called Dual Containment tubing). This “tube-within-a-tube” design prevents the introduction of contaminants during installation and allows for long continuous lengths to be maintained without the need for welding or heat bending.

This high-purity tubing has an inner tube of High Purity (HP) PFA surrounded by an outer tube of FEP for protection from potential hazardous fluid leaks. Double Containment tubing offers low gas permeability, high mechanical strength at elevated temperatures, and is resistant to nearly all common solvents.

Our Double Containment tubing exceeds the stringent requirements of the SEMI F57 specification. We also offer a wide array of semiconductor industry standard and custom sizes as well as options for material combinations.

Our capabilities include manufacturing standard Double Containment tubing in sizes ranging from 0.047″ (1.194 mm) to 0.063″ (1.600 mm) wall and 0.25″ (6.35 mm) outside diameter (OD) to 1.25″ (31.75 mm) OD. This product is end capped and clean room packaged. Our Dual Containment tubing can also be provided with other special options including pre-cut spool lengths, custom laser markings, private labeling, and special packaging.

Contact us or call toll-free in US 1-800-526-3842 or +1-803-268-9500 internationally to find out how you can use Zeus Double Containment Tubing.

  • APPLICATIONS

    Critical Fluids – For fluid management, Dual Containment tubing offers an added level of protection against leaks and as well as permeation of gases and ionic contaminants.

    Semiconductor – The extremely low levels of chemical extractables of Zeus Dual Containment tubing drive its popularity in the semiconductor industry. In addition, this product has continuous service temperature down to -320 °F (-195 °C).

  • KEY PROPERTIES

    Chemically resistant to all common solvents – For critical fluids management, tubing with superior chemical resistance is a key. Zeus Dual Containment is resistant to almost all common solvents.

    Excellent surface smoothness – The highly lubricious nature of both the PFA and FEP means that this tubing product is easy to place into position within your application and allows for easy manipulation of the individual tubes.

    Flame resistant: UL 94 V-0 – Zeus Dual Containment tubing is flame resistant and meets UL 94 V-0 criteria.

    Low gas permeability – Both FEP and PFA have substantially lower permeation to gases than most other plastics making this product a good option where gas permeation is a concern.

    Maintains mechanical strength at high temperatures – FEP and PFA have maximum service temperatures of at least 392 °F (200 °C) allowing for broad flexibility for the application environments.

    Protection against ionic contamination – Should your tubing be exposed to external environments where there are harsh ionizing chemicals, Dual Containment tubing protects not only the fluid component, but also the tubing’s non-reactive chemical nature resists being eroded by the chemicals. Likewise, the reverse is true where the inner layer of the Dual Containment tubing is inert to the fluid flowing through it and thus prevents potential erosion or chemical etching of the inside diameter of the tubing.

    SEMI F57 certified material – This standard delineating the criteria for polymer materials and components used in ultrapure water and liquid chemical distribution systems has been approved by Liquid Chemicals Global Technical Committee. Thus, with Zeus’ certified materials, you know exactly what you are getting.

    Superior high purity properties – With the high degree of purity of the polymer components of Dual Containment tubing, you can have equally high confidence that this product will not adversely affect your critical fluids management.

    Thermal stability – Zeus Dual Containment tubing can operate in temperatures from -328 °F to 392 °F (-200 °C to 200 °C) giving it a wide range of temperature functionality.

    Ultra-low metallic and organic extractables – Coming from the tubing itself, these unwanted chemical entities can attack the tubing wall to degrade it while simultaneously contaminating the fluid. Zeus Dual Containment tubing offers protection against these types of contaminants.

Request a Sample
  • Capabilities / Sizing

    Physical PropertiesTest MethodPFA
    Continuous Service Temp. Range--320°F TO 500°F
    Hardness, Shore DASTM D224055-64
    Tensile Strength, UltimateASTM D6383630-4100 PSI
    Tensile Strength, YieldASTM D6382180-4100 PSI
    Elongation at BreakASTM D638300%
    Tensile ModulusASTM D63810-90 KSI
    Flexural ModulusASTM D79080-95 KSI
    Izod Impact, NotchesASTM D256>1.2
    Coefficient of FrictionASTM D18940.21

    PFA & FEP Tubing - Properties
    PolymerElongation (ASTM D638)Tensile Strength (ASTM D638)Flexural Modulus (ASTM D790)Max Service TemperatureMin Service TemperatureChemical ResistanceCoefficient of Friction (ASTM D1894)
    FEP300-380%91 Mpa0.5 Gpa392°F/200°C-400°F/-240°Cexcellent0.005
    PFA340-400%19-39 Mpa0.5-0.6 Gpa500°F/260°C-450°F/-268°Cexcellent0.2

    HP PFA* Tubing - Standard Sizes
    LineOD (inches)OD Tolerance (inches)Wall (inches)Wall Tolerance (inches)BURST PRESSURE** (PSI @ 72°F)
    Primary1/4+/- 0.005"0.047+/- 0.005"1600
    Secondary Containment1/2+/- 0.005"0.063+/- 0.005"1050
    Primary1/2+/- 0.005"0.063+/- 0.005"1050
    Secondary Containment3/4+/- 0.005"0.063+/- 0.005"700
    Primary3/4+/- 0.005"0.063+/- 0.005"700
    Secondary Containment1+/- 0.006"0.063+/- 0.007"525
    Primary1/2+/- 0.005"0.063+/- 0.005"1050
    Secondary Containment1+/- 0.006"0.063+/- 0.007"525